Question

Mixing water of two different temperatures to aquire a certain temprature geeks for geeks

Answer 1

If there is no other information provided, all you know is that the result will be somewhere in between. If you mix 80°C water and 20°C water, you’ll get water that has the temperature between 20°C and 80°C. And NOT THE AVERAGE. If you put one drop of 80°C water into a glass of 20°C water, obviously you won’t get 50°C water; you’ll get the temperature infinitesimally above 20°C.

By the time I finished the answer there’s already some other people that have explained that it’s proportional to the amount of water you add, i.e.:

Tres=T1m1+T2m2m1+m2Tres=T1m1+T2m2m1+m2